Zend issues
I may have found the problem. I have been able to reproduce this error message:
Deprecated: iconv_set_encoding[]: Use of iconv.internal_encoding is deprecated in C:\xampp\htdocs\kiwitrees\library\Zend\Locale\Format.php on line 313
Not sure if that is the one previously seen, but it will be easy enough to fix, I think.
EDIT (22/07/2015): Zend issues fixed.